747279972757 has 2 divisors, whose sum is σ = 747279972758. Its totient is φ = 747279972756.

The previous prime is 747279972721. The next prime is 747279972773. The reversal of 747279972757 is 757279972747.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 537099902641 + 210180070116 = 732871^2 + 458454^2 .

It is an emirp because it is prime and its reverse (757279972747) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-747279972757 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 747279972757.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (747279972787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 373639986378 + 373639986379.

It is an arithmetic number, because the mean of its divisors is an integer number (373639986379).

Almost surely, 2^747279972757 is an apocalyptic number.

It is an amenable number.

747279972757 is a deficient number, since it is larger than the sum of its proper divisors (1).

747279972757 is an equidigital number, since it uses as much as digits as its factorization.

747279972757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762365520, while the sum is 73.

The spelling of 747279972757 in words is "seven hundred forty-seven billion, two hundred seventy-nine million, nine hundred seventy-two thousand, seven hundred fifty-seven".